Nitrogen Fertilizer
Mostrando 13-24 de 246 artigos, teses e dissertações.
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13. EFFECT OF HEIGHT, TILT AND TWIST ANGLES OF AN ACTIVE REFLECTANCE SENSOR ON NDVI MEASUREMENTS
ABSTRACT The application of nitrogen (N) fertilizer is complex and expensive, so its correct management has financial and environmental benefits. The use of optical proximity sensors is a promising technique. However, the movement of the agricultural machinery or of the person carrying the sensor will result in height differences and/or different tilt and tw
Eng. Agríc.. Publicado em: 09/09/2019
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14. CAPIM TROPICAL MANEJADO SOB LOTAÇÃO INTERMITENTE, SUBMETIDO A FONTES DE FÓSFORO COM DIFERENTES SOLUBILIDADES, ASSOCIADOS OU NÃO À ADUBAÇÃO COM NITROGÊNIO
Resumo Objetivou-se avaliar as características morfogênicas e estruturais do capim-piatã submetido à lotação intermitente e adubado com fontes de fósforo de diferentes solubilidades e adubação nitrogenada. Os tratamentos foram: controle (sem aplicação de adubo fosfatado); fonte de fósforo de lenta solubilidade (FNR); fonte de fósforo de rápida
Ciênc. anim. bras.. Publicado em: 22/08/2019
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15. Nutrient contents and growth of corn fertigated with human urine and cassava wastewater
RESUMO Este trabalho objetivou avaliar os teores dos macronutrientes (NPK e S) e o crescimento do milho ‘Potiguar’ fertigado com urina humana, manipueira e suas associações com NPK. O experimento foi instalado em casa de vegetação localizada no Campus I da Universidade Federal de Campina Grande. Utilizou-se delineamento experimental inteiramente casu
Rev. bras. eng. agríc. ambient.. Publicado em: 12/08/2019
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16. Biodegradable oil-based polymeric coatings on urea fertilizer: N release kinetic transformations of urea in soil
ABSTRACT: Polymer coatings are used to control the rate of release of plant available nutrients from fertilizers as well as to reduce nutrient losses such as ammonia (NH3) volatilization. Although the literature presents several examples of materials used to coat urea, little is known about nitrogen (N) release properties such as the mechanism involved and p
Sci. agric. (Piracicaba, Braz.). Publicado em: 01/07/2019
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17. Grain yield, efficiency and the allocation of foliar N applied to soybean canopies
ABSTRACT: Soybean [Glycine max (L.) Merr.] grain yield is closely associated with the level of optimal nitrogen (N) supply, especially during the reproductive stages. Foliar fertilization with low rates of N have been considered as a strategy for furnishing additional N and enhancing grain yields. Field studies using 15N tracer were conducted over two growin
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-07
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18. Emissions of Nitrous Oxide and Methane in a Subtropical Ferralsol Subjected to Nitrogen Fertilization and Sheep Grazing in Integrated Crop-Livestock System
ABSTRACT Brazilian agriculture contributes significantly to nitrous oxide (N2O) and methane (CH4) emissions, so the understanding of such emissions at the field is crucial for mitigation strategies. This study quantified the impact of N application and sheep grazing on the N2O and CH4 emissions from a subtropical Ferralsol under an integrated crop-livestock
Rev. Bras. Ciênc. Solo. Publicado em: 19/06/2019
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19. Export of N, P and K in barley subjected to fertilizer doses formulated with and without humic substance at sowing
ABSTRACT. The aim of this study was to evaluate the effect of nitrogen fertilization with and without humic acid in barley cultivars on the export of nitrogen, phosphorus and potassium grains. The experiment was performed in the city of Guarapuava, PR, during the 2015 and 2016 growing seasons. The experimental design was in RCB in factorial 5 x 2, with the f
Acta Sci., Agron.. Publicado em: 13/06/2019
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20. Carbon indices to assess quality of management systems in a Subtropical Acrisol
ABSTRACT: Management systems to improve soil quality are essential for agricultural and environmental sustainability. We assessed the quality of soil management systems applied to a subtropical Acrisol in terms of the carbon management index (CMI), the stratification ratio for total organic carbon (SR-TOC) and light fraction of organic matter (SR-LF). In add
Sci. agric. (Piracicaba, Braz.). Publicado em: 30/05/2019
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21. Ammonia Volatilization from Soil-Applied Organic Fertilizers
ABSTRACT: A reliable quantification of nitrogen (N) losses by ammonia (NH3) volatilization can contribute to identifying optimized strategies of fertilizer management. The objective of this study was to quantify ammonia volatilization from several organic N sources incorporated into or applied onto the soil surface. Two cultivation areas, under snap bean and
Rev. Bras. Ciênc. Solo. Publicado em: 27/05/2019
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22. NITROGEN AND ORGANIC FERTILIZATION ON GRAPEVINE PRODUCTIVITY IN THE BRAZILIAN SEMIARID REGION
RESUMO A adubação nitrogenada na videira apresenta-se como um fator limitante na produção, visto que seu excesso ou deficiência são capazes de propiciar alterações na quantidade e qualidade final dos frutos. Assim, o objetivo deste trabalho foi avaliar os parâmetros produtivos da videira 'Isabel Precoce' submetida a adubação nitrogenada e orgânic
Rev. Caatinga. Publicado em: 09/05/2019
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23. CO-INOCULATION OF GROWTH PROMOTING BACTERIA AND Glomus clarum IN MICROPROPAGATED CASSAVA PLANTS
RESUMO Os fungos micorrízicos arbusculares (FMA) e com as bactérias promotoras de crescimento (BPCPs) beneficiam a sobrevivência e o desenvolvimento de plântulas; tais benefícios são atribuídos ao aumento da absorção de nutrientes, aumento da taxa fotossintética, e aumento da tolerância a estresse abiótico. O objetivo deste estudo foi o de avalia
Rev. Caatinga. Publicado em: 09/05/2019
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24. Decision-making on the optimum timing for nitrogen fertilization on sugarcane ratoon
ABSTRACT: Low efficiency of nitrogen from fertilizers is a major concern worldwide, threatening the sustainability of sugarcane production. The N use efficiency (NUE) by sugarcane can be improved by adopting better fertilizing management practices, reducing environmental impacts. This work evaluated the effects of varying N rates and time of application on s
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-05